package com.zrrd.app.gateway.filter;

import com.zrrd.app.gateway.utils.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.checkerframework.checker.units.qual.A;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * @author WanJl
 * @version 1.0
 * @title AuthorizeFilter
 * @description
 * @create 2023/9/14 16:47
 */
@Component
@Slf4j
public class AuthorizeFilter implements Ordered, GlobalFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //1、获取request对象和response对象
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        //2、判断是否是登录
        if (request.getURI().getPath().contains("/login")){
            //放行
            return chain.filter(exchange);
        }
        //3、如果不是登录操作，需要获取token
        String token = request.getHeaders().getFirst("token");

        //4、判断token是否存在，
        if (StringUtils.isBlank(token)){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        try{
            //5、如果token存在，判断token是否有效
            Claims claimsBody = AppJwtUtil.getClaimsBody(token);
            //判断是否过期
            int result = AppJwtUtil.verifyToken(claimsBody);
            if (result==1||result==2){
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                return response.setComplete();
            }
        }catch (Exception e){
            e.printStackTrace();
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

        //6、放行
        return chain.filter(exchange);
    }

    /**
     * 设置优先级，数值越小，优先级越高。
     * @return
     */
    @Override
    public int getOrder() {
        return 0;
    }
}
